Jack up rig welding

[Pravin G]

Dear expert,

I'm seeking for your valuable technical advice.
Currently we are working on jack up rig project.
Client insist to use GMAW process for root pass and continue with FCAW.

Section: chord and rack
Thickness:100mm
Root cap: 2-3mm
Material: ABS EQ70

In my experience, for root welding mostly GTAW or SMAW is preferred.

I have explained to client using GMAW process might cause burn through or lack of fusion due to high welding current and travel speed.

Kindly advice if GMAW process is advisable to use? Appreciate your valuable advice.

Pravin Poornachandran
Singapore (JWES)

Sent from my iPhone

[anand gupta]

Dear

in higher thk material we can do GMAW AND FCAW AS PER QUALIFIED WPS.

REGARDS

A P GUPTA

Sent from Yahoo Mail on Android

On Tue, 7 Jun, 2016 at 5:35, Pravin G

<htcis...@gmail.com> wrote:

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[MUNHOZ Sergio TECHINT]

GMAW controlled short arc process can be used with very good results and high productivity, please refer to RMD Processes from MILLER Welds or STT Process from LINCOLN ELECTRICS

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De: material...@googlegroups.com [mailto:material...@googlegroups.com] Em nome de PUB:Pravin G
Enviada em: segunda-feira, 6 de junho de 2016 21:05
Para: 'Agustin Jimenez' via Materials & Welding
Assunto: [MW:24925] Jack up rig welding

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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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[c sridhar]

GMAW  for root pass can be done with Dip (or) Short circuit transfer.

It is successfully used in pipe joints also. Filler and cap passes done by Dip (or)

Globular transfer.

In fact, if your client accepts, full welding can be done with FCAW itself as it saves 

inventory costs also. 

In both cases, welders to be trained properly to maintain Current, Voltage, Stick out, 

Torch & travel angle and weld speed to get Quality welds.

Best of Luck !

Sridhar.

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From: 'anand gupta' via Materials & Welding <material...@googlegroups.com>
To: "material...@googlegroups.com" <material...@googlegroups.com>
Sent: Tuesday, 7 June 2016 10:20 AM
Subject: Re: [MW:24926] Jack up rig welding

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